Fix.

node_modules/caseless/index.js

@@ -0,0 +1,67 @@
+function Caseless (dict) {
+  this.dict = dict || {}
+}
+Caseless.prototype.set = function (name, value, clobber) {
+  if (typeof name === 'object') {
+    for (var i in name) {
+      this.set(i, name[i], value)
+    }
+  } else {
+    if (typeof clobber === 'undefined') clobber = true
+    var has = this.has(name)
+
+    if (!clobber && has) this.dict[has] = this.dict[has] + ',' + value
+    else this.dict[has || name] = value
+    return has
+  }
+}
+Caseless.prototype.has = function (name) {
+  var keys = Object.keys(this.dict)
+    , name = name.toLowerCase()
+    ;
+  for (var i=0;i<keys.length;i++) {
+    if (keys[i].toLowerCase() === name) return keys[i]
+  }
+  return false
+}
+Caseless.prototype.get = function (name) {
+  name = name.toLowerCase()
+  var result, _key
+  var headers = this.dict
+  Object.keys(headers).forEach(function (key) {
+    _key = key.toLowerCase()
+    if (name === _key) result = headers[key]
+  })
+  return result
+}
+Caseless.prototype.swap = function (name) {
+  var has = this.has(name)
+  if (has === name) return
+  if (!has) throw new Error('There is no header than matches "'+name+'"')
+  this.dict[name] = this.dict[has]
+  delete this.dict[has]
+}
+Caseless.prototype.del = function (name) {
+  var has = this.has(name)
+  return delete this.dict[has || name]
+}
+
+module.exports = function (dict) {return new Caseless(dict)}
+module.exports.httpify = function (resp, headers) {
+  var c = new Caseless(headers)
+  resp.setHeader = function (key, value, clobber) {
+    if (typeof value === 'undefined') return
+    return c.set(key, value, clobber)
+  }
+  resp.hasHeader = function (key) {
+    return c.has(key)
+  }
+  resp.getHeader = function (key) {
+    return c.get(key)
+  }
+  resp.removeHeader = function (key) {
+    return c.del(key)
+  }
+  resp.headers = c.dict
+  return c
+}